add halving

src/test/app/Import_json.h

@@ -1155,6 +1155,102 @@ std::string ImportTCPayment::w_seed = R"json({
 }
 })json";
 
+class ImportTCHalving
+{
+public:
+    static std::string one_one;
+};
+
+std::string ImportTCHalving::one_one = R"json({
+  "ledger": {
+    "accepted": true,
+    "accountState": [
+      {
+        "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
+        "Balance": "0",
+        "Flags": 0,
+        "LedgerEntryType": "AccountRoot",
+        "OwnerCount": 0,
+        "PreviousTxnID": "A92EF82C3C68F771927E3892A2F708F12CBD492EF68A860F042E4053C8EC6C8D",
+        "PreviousTxnLgrSeq": 0,
+        "Sequence": 1,
+        "index": "2B6AC232AA4C4BE41BF49D2459FA4A0347E1B543A4C92FCEE0821C0201E2E9A8"
+      },
+      {
+        "Amendments": [
+          "740352F2412A9909880C23A559FCECEDA3BE2126FED62FC7660D628A06927F11",
+          "3012E8230864E95A58C60FD61430D7E1B4D3353195F2981DC12B0C7C0950FFAC",
+          "67A34F2CF55BFC0F93AACD5B281413176FEE195269FA6D95219A2DF738671172",
+          "F64E1EABBE79D55B3BB82020516CEC2C582A98A6BFE20FBE9BB6A0D233418064",
+          "157D2D480E006395B76F948E3E07A45A05FE10230D88A7993C71F97AE4B1F2D1",
+          "7117E2EC2DBF119CA55181D69819F1999ECEE1A0225A7FD2B9ED47940968479C",
+          "CA7C02118BA27599528543DFE77BA6838D1B0F43B447D4D7F53523CE6A0E9AC2",
+          "58BE9B5968C4DA7C59BA900961828B113E5490699B21877DEF9A31E9D0FE5D5F",
+          "3CBC5C4E630A1B82380295CDA84B32B49DD066602E74E39B85EF64137FA65194",
+          "5D08145F0A4983F23AFFFF514E83FAD355C5ABFBB6CAB76FB5BC8519FF5F33BE",
+          "FBD513F1B893AC765B78F250E6FFA6A11B573209D1842ADC787C850696741288",
+          "586480873651E106F1D6339B0C4A8945BA705A777F3F4524626FF1FC07EFE41D",
+          "2CD5286D8D687E98B41102BDD797198E81EA41DF7BD104E6561FEB104EFF2561",
+          "C4483A1896170C66C098DEA5B0E024309C60DC960DE5F01CD7AF986AA3D9AD37",
+          "8F81B066ED20DAECA20DF57187767685EEF3980B228E0667A650BAF24426D3B4",
+          "621A0B264970359869E3C0363A899909AAB7A887C8B73519E4ECF952D33258A8",
+          "89308AF3B8B10B7192C4E613E1D2E4D9BA64B2EE2D5232402AE82A6A7220D953",
+          "00C1FC4A53E60AB02C864641002B3172F38677E29C26C5406685179B37E1EDAC",
+          "25BA44241B3BD880770BFA4DA21C7180576831855368CBEC6A3154FDE4A7676E",
+          "1F4AFA8FA1BC8827AD4C0F682C03A8B671DCDF6B5C4DE36D44243A684103EF88",
+          "4F46DF03559967AC60F2EB272FEFE3928A7594A45FF774B87A7E540DB0F8F068",
+          "B4E4F5D2D6FB84DF7399960A732309C9FD530EAE5941838160042833625A6076",
+          "955DF3FA5891195A9DAEFA1DDC6BB244B545DDE1BAA84CBB25D5F12A8DA68A0C",
+          "AF8DF7465C338AE64B1E937D6C8DA138C0D63AD5134A68792BBBE1F63356C422",
+          "452F5906C46D46F407883344BFDD90E672B672C5E9943DB4891E3A34FEEEB9DB",
+          "B6B3EEDC0267AB50491FDC450A398AF30DBCD977CECED8BEF2499CAB5DAC19E2",
+          "98DECF327BF79997AEC178323AD51A830E457BFC6D454DAF3E46E5EC42DC619F",
+          "B2A4DB846F0891BF2C76AB2F2ACC8F5B4EC64437135C6E56F3F859DE5FFD5856",
+          "32A122F1352A4C7B3A6D790362CC34749C5E57FCE896377BFDC6CCD14F6CD627",
+          "F1ED6B4A411D8B872E65B9DCB4C8B100375B0DD3D62D07192E011D6D7F339013",
+          "75A7E01C505DD5A179DFE3E000A9B6F1EDDEB55A12F95579A23E15B15DC8BE5A",
+          "47C3002ABA31628447E8E9A8B315FAA935CE30183F9A9B86845E469CA2CDC3DF",
+          "93E516234E35E08CA689FA33A6D38E103881F8DCB53023F728C307AA89D515A7",
+          "2E2FB9CF8A44EB80F4694D38AADAE9B8B7ADAFD2F092E10068E61C98C4F092B0",
+          "73761231F7F3D94EC3D8C63D91BDD0D89045C6F71B917D1925C01253515A6669",
+          "AE35ABDEFBDE520372B31C957020B34A7A4A9DC3115A69803A44016477C84D6E",
+          "ECE6819DBA5DB528F1A241695F5A9811EF99467CDE22510954FD357780BBD078",
+          "42F8B586B357ABBAAAA1C733C3E7D3B75761395340D0CDF600179E8737E22478",
+          "919857E4B902A20216E4819B9BD9FD1FD19A66ECF63151C18A4C48C873DB9578",
+          "ECF412BE0964EC2E71DCF807EEEA6EA8470D3DB15173D46F28AB6E234860AC32",
+          "86E83A7D2ECE3AD5FA87AB2195AE015C950469ABF0B72EAACED318F74886AE90",
+          "3C43D9A973AA4443EF3FC38E42DD306160FBFFDAB901CD8BAA15D09F2597EB87",
+          "0285B7E5E08E1A8E4C15636F0591D87F73CB6A7B6452A932AD72BBC8E5D1CBE3",
+          "36799EA497B1369B170805C078AEFE6188345F9B3E324C21E9CA3FF574E3C3D6",
+          "F5751842D26FC057B92CAA435ABF4F1428C2BCC4180D18775ADE92CB2643BBA3"
+        ],
+        "Flags": 0,
+        "LedgerEntryType": "Amendments",
+        "index": "7DB0788C020F02780A673DC74757F23823FA3014C1866E72CC4CD8B226CD6EF4"
+      }
+    ],
+    "account_hash": "5DF3A98772FB73E782B8740E87885C6BAD9BA486422E3626DEF968AD2CB2C514",
+    "close_flags": 0,
+    "close_time": 0,
+    "close_time_human": "2000-Jan-01 00:00:00.000000",
+    "close_time_resolution": 10,
+    "closed": true,
+    "hash": "56DA0940767AC2F17F0E384F04816002403D0756432B9D503DDA20128A2AAF11",
+    "ledger_hash": "56DA0940767AC2F17F0E384F04816002403D0756432B9D503DDA20128A2AAF11",
+    "ledger_index": "1999998",
+    "parent_close_time": 0,
+    "parent_hash": "56DA0940767AC2F17F0E384F04816002403D0756432B9D503DDA20128A2AAF11",
+    "seqNum": "1999998",
+    "totalCoins": "0",
+    "total_coins": "0",
+    "transaction_hash": "9A77D1D1A4B36DA77B9C4DC63FDEB8F821741D157802F9C42A6ED86003D8B4A0",
+    "transactions": []
+  },
+  "ledger_current_index": 1999998,
+  "status": "success",
+  "validated": true
+})json";
+
 }  // namespace test
 }  // namespace ripple
 #endif

src/test/app/Import_test.cpp

@@ -4508,6 +4508,113 @@ class Import_test : public beast::unit_test::suite
         // }
     }
 
+    std::unique_ptr<Config>
+    makeGenesisConfig(
+        uint32_t networkID,
+        std::string fee,
+        std::string a_res,
+        std::string o_res,
+        std::string filepath)
+    {
+        using namespace jtx;
+
+        // IMPORT VL KEY
+        std::vector<std::string> const keys = {
+            "ED74D4036C6591A4BDF9C54CEFA39B996A"
+            "5DCE5F86D11FDA1874481CE9D5A1CDC1"};
+
+        return envconfig([&](std::unique_ptr<Config> cfg) {
+            cfg->NETWORK_ID = networkID;
+            cfg->START_LEDGER = filepath;
+            cfg->START_UP = Config::LOAD_FILE;
+            Section config;
+            config.append(
+                {"reference_fee = " + fee,
+                    "account_reserve = " + a_res,
+                    "owner_reserve = " + o_res});
+            auto setup = setup_FeeVote(config);
+            cfg->FEES = setup;
+
+            for (auto const& strPk : keys)
+            {
+                auto pkHex = strUnHex(strPk);
+                if (!pkHex)
+                    Throw<std::runtime_error>(
+                        "Import VL Key '" + strPk + "' was not valid hex.");
+
+                auto const pkType = publicKeyType(makeSlice(*pkHex));
+                if (!pkType)
+                    Throw<std::runtime_error>(
+                        "Import VL Key '" + strPk +
+                        "' was not a valid key type.");
+
+                cfg->IMPORT_VL_KEYS.emplace(strPk, makeSlice(*pkHex));
+            }
+            return cfg;
+        });
+    }
+
+    void
+    testHalving(FeatureBitset features)
+    {
+        testcase("halving");
+
+        using namespace test::jtx;
+        using namespace std::literals;
+
+        // Halving 1:1
+        {
+            test::jtx::Env env{
+                *this,
+                makeGenesisConfig(
+                    21337,
+                    "10",
+                    "1000000",
+                    "200000",
+                    "../src/test/app/halve_1_1.json"
+                )
+            };
+
+            auto const feeDrops = env.current()->fees().base;
+            
+            // confirm total coins header
+            auto initCoins = env.current()->info().drops;
+            BEAST_EXPECT(initCoins == 0);
+            auto initSeq = env.current()->info().seq;
+            std::cout << "initSeq: " << initSeq << "\n";
+            BEAST_EXPECT(initSeq == 1'999'999);
+
+            // init env
+            auto const alice = Account("alice");
+            env.memoize(alice);
+
+            // confirm env
+            auto const preAlice = env.balance(alice);
+            BEAST_EXPECT(preAlice == XRP(0));
+
+            // import tx
+            auto const xpopJson = loadXpop(ImportTCAccountSet::min);
+            Json::Value tx = import(alice, xpopJson);
+            tx[jss::Sequence] = 0;
+            tx[jss::Fee] = 0;
+            env(tx, alice, ter(tesSUCCESS));
+            env.close();
+
+            // total burn = burn drops + Init Reward
+            auto const creditDrops = drops(10) + XRP(2);
+            std::cout << "creditDrops: " << creditDrops << "\n";
+
+            // confirm fee was minted
+            auto const postAlice = env.balance(alice);
+            BEAST_EXPECT(postAlice == preAlice + creditDrops);
+
+            // confirm total coins header
+            auto const postCoins = env.current()->info().drops;
+            BEAST_EXPECT(postCoins == initCoins + creditDrops);
+        }
+    }
+
+
 public:
     void
     run() override
@@ -4540,6 +4647,7 @@ public:
         testImportSequence(features);
         testMaxSupply(features);
         testMinMax(features);
+        testHalving(features);
     }
 };